IF = [7 11 17 27 39 69 89 131 198 290 433 641 949 2080 ...
    3090 4580 6820 10130 15000 22300 33100 49100];
IF = IF*10^-6;%A
VF = zeros(22,1)';
VF(1:1:14) = 0.36:0.01:0.49;
VF(15:1:22) = 0.51:0.01:0.58;

scatter(VF,IF);